Piston-packing.



c. H. MILES.

PISTON PACKING.

APPLICATION FILED OCT- 2, 1913.

1 205,558. Patented Nov. 21, 1916.

ii/A UNITED STATES PATENT, onruon.

CHARLES H. MILES, OF FORT WORTH, TEXAS, ASSIGNOR TO MOTOR EQUIPMENT COM-PANY, OF FORT WORTH, TEXAS, A FIRM COMPOSED OF 0. S. LATTIMORE, $3., K.D. HOLLAND, R. C. LEWIS, AND C. H. MILES.

PISTON-PACKING.

Specification of Letters Patent.

Patented Nov. 21, 1916.

Application filed October 2, 1913. Serial No. 792,988.

Toall whom it may concern:

Beit known that I, CHARLES H. MILES, a citizen of the United States,residing at Fort WVorth, in the county of Tarrant and State of Texas,have invented certain new and useful Improvements inPiston-Packing, ofwhich the following is a specification.

My invention relates to piston packing for steam or internal combustionengine pistons, and the object is to provide perfect packing expansiblerings for plunger pistons so that there can be no leaking of steam or ofexplosive force past the pistons and to provide a continuous packingsurface both in the bottom of the groove of the piston and on theexterior surface of the packing.

Other objects and advantages will be fully explained in the followingdescription and the invention will be more particularly pointed out inthe claims.

Reference is had to the accompanying drawings which form a part of thisv application.

Figure 1 is a top plan view of the packing rings. Fig. 2 is an invertedplan view. Fig. 3 is a similar view to Fig. 2, but showing how the ringsmay be cut away as much as one third and still be perfect packing rings.Fig. & is a. cross-section of the packing rings fitted in a pistongroove.

Similar characters of reference are used to indicate the same partsthroughout the several views.

The improved packing is made up of a spring open ring 1 which has aright angle flange 5 at the top, and an exterior open ring 2. The ring 1is open at 3 and the ring 2 is open at 4. The flange 5 is. an exteriorflange and extends outwardly flush with the outer surface of the ring 2.A lug 6 may be attached to the exterior of the ring 1 at the point 4where the outer ring 2 is severed to prevent circumferential movement ofthe ring 2 on the ring 1. The joint between the flanged ring 1 and ring2 is a ground joint andno gas or other element will pass through thisjoint. For this reason, gases or any other element cannot pass below thebottom edges 7 of the rings, where one ring is cutaway theother beingcontinuous and the two rings having their bottom surfaces 7 flush witheach other. There is thus a continuous packing surface in the bottom ofthe groove in the piston. The ground joint 8 will be steam or explosivemixture tight. The packing surface will be continuous on the outerperiphery because of the ground oint 8 and because that part 9 of theflange 5 will bridge the cut-out 4 between the ends of the ring orpacking 2. The pressure of the explosive force in internal combustionengines will be on the edge 10 of the packing and will thus press thetwo edges 7 against the bottom of the groove in the piston. As abovepointed out, the two edges make a continuous packing surface in thebottom of the groove, consequently the packing will be gas and steamtight against pressure on the top edge 10 of the packing.

Attention is called to the fact that the greater packing surface of thepacking shown is parallel with thesurface of the piston and the lesspacking surface is perpendicular or at right angles to the surface ofthe piston. The two members of the packing being made of spring metal,the tendency will be to expand and to keep the piston packed.

In Fig. 4 12 indicates the pressure end of a piston. The piston has anannular groove therein and the packing side of the groove in pistons forinternal combustion'engines is indicated at 11. The edges 7 of thepacking members will press on the side 11 and form a perfect seal. Thepacking member 2 and the flange 5 will make a continuous pressuresurface for sealing against the interior of the cylinder.

Vhat I claim is,

1. Piston packing comprising an inner open ring member having a flangeat the top edge projecting radially outward and providing a packing orpressure surface on top thereof and an open ring member mounted on theexterior of said inner member and having the outer surface thereofflushwith the outer surface of said flange and having the bottom edgethereof flush with the bottom edge of said inner member, both membersbeing automatically expansible by the resiliency of the metal.

2. Piston packing comprising an inner open ring automatically expansiblemember provided with an exterior flange projecting radially from thepressure edge thereof forming a pressure surface on the top edge 'of thering and an outer open ring automaticall y eXpansible member mounted onIn testimony whereof, I set my hand, in the exterior of the said innermember and the presence of tWo Witnesses, this 29th day having itsperipheral pressure surface flush of September, 1913.

with the outer edge of said flange and hav- CHAS. H. MILES. ingitsbottom edge flush with the bottom v VitneSses:- edge of sziid innermember and said mem- A. L. JACKSON,

bers being connected by a ground joint. N OBLE LLOYD.

